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Soliva anthemifolia
(Juss.) R. Br. ex Less.
Family:
Asteraceae
Button Burrweed
[
Gymnostyles anthemidifolia
Juss.]
FNA
Resources
Linda E. Watson in Flora of North America (vol. 19, 20 and 21)
Plants
mostly 3-15(-30+) cm (high or across), ± villous, glabrescent (sometimes stoloniferous, ± mat-forming).
Leaves
mostly basal; blades ± obovate to spatulate, 3-8(-15) cm, 2-3-pinnati-palmately lobed.
Heads
mostly clustered in leaf axils (at ground level), rarely scattered along stems.
Involucres
4-8+ mm diam.
Pistillate florets
(20-)50-100+ in 1-8+ series.
Disc florets
2-4+; corollas 1.5-2 mm.
Cypselae:
bodies oblanceolate to cuneate-oblong, 1.5-2+ mm, wings transversely rugulose or ribbed on proximal
2
/3, shoulders not spinose laterally, faces distally villous to pilose, sometimes glabrescent;
pappi
0 (persistent stylar sheaths indurate, spinelike, 1.5-3 mm, usually inflexed).
2
n
= 118 (Punjab).
Flowering Mar-May(-Aug). Disturbed sites; 10-100+ m; introduced; Ark., Fla., La., Tex.; South America; introduced also in Mexico, Asia, Australia.
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This project made possible by
National Science Foundation Award 1410069
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